irene3492
03.08.2019 •
Mathematics
Amachine can fill a box with twenty pencils in 30 seconds. how many boxes can the machine fill in 2 hours? a) 2 boxes b) 120 boxes c) 240 boxes d) 2400 boxes
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Ответ:
20 : 30
x : 7200
∴(20*7200)/30=4800
Step-by-step explanation:
20 pencils is to 30 seconds so x is to 7200(2 hours is seconds) then cross multiply and lastly divide 144000 by 30 to get the answer
Ответ: